Distribution of muons in substituted benzenes

Abstract

Muon polarization values are given in Table 7.1. PD values range between 0.15 for unsubstituted benzene and 0.76 for thiophenol. They increase in the series X = F < Cl < Br < I and in X = CH3 < CH2C1 < CHCl2 < CHCl3, and they are higher for α-chloro toluenes than for chlorobenzene. They correlate with C — Cl bond dissociation energies and parallel the efficiency of the reaction of these compounds with electrons via dissociative capture [97].